Filter for cisterns.



PATENTD UG. M, 1906.

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UNITED STATES PATENT OFFICE.

Specioaton of Letters Patent.

Patented Aug. 14, 19GB.

Automation filed March 26, 1906. Serial Re 308.110.

To all whom it may concern:

Be it known that l, W'iLLrAM H. DUNcAn, a citizen of the United States,residing at Vilii mingtonj in the count of Clinton and StateV of Ohio,have inventer a new and useful Eil,e ter for Cisterns, of which thefollowing is a specification.

This invention relates to devices for filtering water, more particularlyto devices 'of this character through which rain-water is conducted inits passage from the roof to Ythe cistern or storage-tank, and has forits object to improve the construction and increase the etlciency ofdevices of this character.

With these and other objects in view, which will appear as the nature ofthe invention is better understood, the invention consists in certainnovel features of construction, as hereinafter fullyT described andclaimed.

In the accompanying drawings, forming e part of this specification, andin which correspending parts are denoted by like designating characters,is illustrated the preferred form oi the embodiment of the inventioneapable of carrying the same into practical operation.

.ln the drawings, Fi ure 1 is a vertical section of the improve device.Fig. 2 is a transverse section on the line 2 2 of Fig. 1.

The improved device consists generally in a rece itacle for thefiltering material, so arrange that the water to be filtered may beconducted through the filtered material or turned aside, if re uired,and conducted into a wasteoutlet or rainage means.

The im vroved apparatus comprises more particular y a casing for thefiltering material, a receiving-chamber for the water to be filtered, adrainage means associated with the chamber and casing and so arrangedand connested that the water may be conducted from the receiving-chamberthrough the iiltering material or directly from the receivingcliarnberinto the drainage means, as may be re uired. Y

n the embodiment of the invention einployed for illustration is shown aeasing 1U of any suitable material, the material employed dependinglargely upon the location of the casing.

lf the device is located above the ground, the casing may be oftanlvsteel or similar material, and if located below the ground or partially in the ground the casing will usually be of concrete, tiling, orsimilar material.

For the purpose of illustration the easing is represented constructed ofconcrete, which is the preferred material under ordinary circumstances.

The easing is formed with an inclined bottom 11 and with adischarge-duct 12 leading from the lowest point ol the inclined bottomand with a valve-seat 13 at the entrance to the duct. The upper end ofthe casing is provided with a partition le; preferably integral with thecasing and inclined from all sides to the center and forming a chamber 15 'inthe up er end of the casing. The casing is also provided with aclosure 161 preferably of iron, and with a cellar 30 to receive thedownspout from the roof.

Disposed within the casing is a central tube 1S, with its lower endbearing over the valveseat 13 and its upper end protruding through thepartition 14 and extending into the chamber 15` The portion of thetubular member 18 above theY partition 14 is provided with a pluralityof transverse apertures 1Q, while the ower end of the tubular member isalso previded with a plurality of transverse apertures 20, the latterapertures being disposed just above the inclined bottom 11 of the easiin Y Y gThe upperV end of the tubular member is provided with a closure21, through which a rod 22 extends, the rod carrying a float 23 at theupper end within the chamber 15 and with a valve 24 at the lower end forbearing upon the seat 13.

The outlet 25 of the casing leads therefrom near the upper end and isprovided with a screen 26 to revent the entrance of forel n matter, aswe l as to prevent the esca e of t ie eontents of the casing. Disposedwithin the casing at one side is a semicircular partition 2?, 'with itsedges attached at 2S 29 to the inner walls of the casing. The partition27 extends through the transverse partition 14 and also throuffh theclosure 16 and termi` nates beneath the collar E() to receive the wa-vter from the down-spout.

At its lower end the partition 27 is provided with a plurality oftransverse apertures 31 to permit the water to escape into the interiorof the easing,

The casing 1() is filled with suitable filtering material, such asgravel and sand or the like, while the area within the partition 27 islikewise partially iillcd with similar material or with gravel alone,and above the gravel within the partition 14 are disposed alternatelayers of fabric 17 and iiltcring material, such as gravel, sand, andthe like.

Any suitable iiltering material may be employed, dependent upon thecondition of the water to be filtered, as the matter held in susense insome qualities of water and in some ocalities may req uire differentcombinations `of the filtering material to remove them, and

I do not, therefore, desire to be limited in any manner to the'Iiltering com ound employe( The apertures in the tubular member 18, asWell as in the partition 2T, are preferably protected by 'line screen`material or gauze, as shown, respectively, at 33 and 34. By thisarrangement the watrr entering through the down-spout flows into thechamber 27 Iand thence through the aperture 31 into the casing 1() andrising through the filtering material escapes at the discharge 25.

If the sup ly of water is greater than the ca acity of t ie discharge25, a back pressure Wi l be created which will flood the chamber l5 andelevate the float 23, and thus open the valve 24 and permit the surpluswater te escape through the drainage-tube 12. When the excess flowceases, the float will drop by gravity and close the valve 24. 'lhedevice is thus automatic in its action and all danger of floodin acistern or tank is obviated.

A smal drainage-channel 32 is formed in the seat 13 for the valve 24 topermit any water which may remain in the filter or in the tubularmembers 18 and 22 to slowly escape after the How from the down-spout hasceased, and thus avoid any danger of freezing in cold Weather.

The device may be of any required size or capacity and employed forpurifying water received from any source, but, as above noted,

is more particularly designed for use in iltering rain-Water on its wayfrom the roof to the eistern or tank.

Having thus described the invention, what is claimed is l. A filteringapparatus comprising a cas ing havinff a partition intermediate thereofand with bltering material at one side of the partition, a drainagemeans leading from said easing, a tubular member leading through saidpartition and communicating with. the easing and also with said drainagemeans, a valve for controlling the outiio'w through said drainage means,a Heat connected to said valve, and means whereby an abnormal flow ofwater will actuate said loat and open said valve.

2. A filtering apparatus comprising a casing having a partitionintermediate thereof, a drainage-tube leading from said easing, a valveseated in the drainage-tube, a tubular member eXtendin through saidpartition and easing and inc osing said valve and communicating adjacentto the valve with the interior of the easing, filtering material withinthe easing and surrounding the tubular meniber, a Heat in the chamberformed by said partition, and a rod between said float and valve.

In testimony that l claim the foregoing as my own l have hereto aHiXedmy signature in the presence of two Witnesses.

WILLIAM H. DUNCAN.

Witnesses:

HARRY GAsKILL, E. C. HAYNES.

